Hydraulic storage and delivery system.



G. FARR.

HYDRAULIC STORAGE AND DELIVERY SYSTEM.

APPLICATION FILED JAN. 21, 1918.

avvum/vtoz [710. 075% G [arr I Patented Apr. 8,191Q.

FREDERICK G. FARR, OF DETROIT, MICHIGAN, ASSIGNOR TO HYDRAULIC OIL SYSTEMS CORPORATION, OI DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

HYDRAULIC STORAGE AND DELIVERY SYSTEM.

Specification of Letters Patent.

Patented Apr. 8, 1919.

Application filed January 21. 1918. Serial No. 212.918.

To all whom it may concern Be it known that I, FREDERICK G. FARR, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Hydraulic Storage and Delivery Systems, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to hydraulic oil storageand delivery systems of that type in which the oil is displaced from the tank by water at a predetermined head, and, in filling, the water at a lower head is displaced by the oil. It is usual to provide such systems with the two heads, together with controlling devices by which change may be instantly made from one head to the other. Such a change places an objectionable sudden stress upon the tank, as inertia prevents the instantaneous movement of the oil when the greater water head is placed thereon and the hydrostatic pressure therefore reacts upon the walls of the tank. With the present invention I have avoided this objection by means for gradually changing from one head to theother, thereby allowing time for the oil to acquire a velocity. My improvement also provides for the gradual lowering of the head so as to prevent the momentum of the desoendin oil column from carrying it beyond the point of balance and displacing more water than required.

In the drawings, I have illustrated my-systern in diagram.

A is the storage tank, .B is'the' delivery conduit for the oil extending to the elevation desired, and C is a'fill connection at a lower elevation. D is the water displacement connection to the lower end of the tank and E is the valve which alternately connects the conduit D with a discharge conduit F and a water supply conduit G.

With the parts as thus far described, Whenever the valve E is manipulated to open the water supply connection and to close the discharge connection the pressure of the water supply would be instantaneously communicated to the water in the conduit D and would be communicated therefrom to the ations in the relative levels.

upon the Walls of the tank. Such an effect I have avoided by placin in connection with the conduit E a riser II, which extends to th point of the maximum head desired and there connects with a depending overflow or discharge, such as I. Preferably a siphon-breaker I is ,mounted at the juncture of the pipes H and I. The size of the conduit H is proportioned to the size of the delivery conduit B and also to the volume of liquid delivered from the conduit G, the effect being to produce a gradually rising head in the conduit H and a corresponding rising pressure in the tank A. In the delivery conduit B there will be a corresponding gradual rise until the elevation of the discharge is attained, and when the column is once in motion the pressure reaction on the walls of the tank will be reduced. By placing the conduit H in communication with an overflow connection at a point below the top of the oil delivery conduit B, there is eliminated the possibility of water being discharged from the oiloutlet after the 011 supply in the tank A is exhausted.

When the valve E is manipulated to shut off connection with the conduit- G and open connection with the waste conduit F the water in the riser H will'gradually fall, and at the same time the balancing column of oil in the conduit B will fall, both reacting upon the liquid in the tank -A equally and in opposite directions so as to avoid any fluctu- Thus the defect incident to the use of the fixed-head systems of the over-displacement of water,

due to the falling column of oil, entirely avoided with my system.

As has been stated, it is desirable to regulate the tolume and velocity of water passing from the conduit G through the valve E to the conduit D and riser H. This regulation is afiected by various conditions, suchof the groundandfwith a drain connection at a level where it. can be easily protected, but with the elevated tank necessary for a high nater head it is diflicult to'prevent exposure to freezing temperatures. \Vith my improved system the water only rises for a brief interval during the delivery of oil and then drops to the drain level, so that there is not time for freezing to occur.

\Vhat I claim as my im'ent-ion is:

1. In a hydraulic storage and delivery system the combination 'ith a tank and a delivery conduit connected therewith, of a. displacement. connection having a normal minimum head, a riser from said connection extending to the point of the maximum head desired and having an overflow provision at said point, 'means for alternately admitting and discharging liquid to said displacement connection and means for regulating the rate of admission of said liquid.

2. In a hydraulic storage and delivery system, the combination with a tank and a delivery conduitrising therefrom, of a displacement connection having a normal mint mum head, a riser from said connection, ex tending to a level below the upper end of said delivery conduit, a drain pipe conm1unicat ing with the upper end of said riser and depending therefrom, and means for iut roducing the displacement fluid into said connec-' tion to effect a gradual rise between the minimum and maximumlimits, and a corresponding rise of the fluid in the delivery conduit.

3. In a hydrauli storage and delivery system, the combination with a tank and a delivery conduit rising therefrom, of a displacement connection having 'a. normalminimum head, a riser from said connection to a maximum head, a drain pipe communicating with the upper end of said riser and depending therefrom, a siphon breaker at the junction of said riser and drain pipe, and means for introducing the displacement fluid into said riser to effect a gradual rise between the minimum and maximum limits, and a corresponding rise of the fluid in the delivery conduit.

In testimony whereof I aflix mv signature.

FREDERICK G. FARR. 

